package cn.tedu.ivos.audit.service.impl;

import cn.tedu.ivos.application.mapper.ApplicationMapper;
import cn.tedu.ivos.application.pojo.entity.Application;
import cn.tedu.ivos.audit.mapper.AuditMapper;
import cn.tedu.ivos.audit.pojo.dto.AuditQuery;
import cn.tedu.ivos.audit.pojo.dto.AuditSaveParam;
import cn.tedu.ivos.audit.pojo.entity.Audit;
import cn.tedu.ivos.audit.pojo.vo.AuditVO;
import cn.tedu.ivos.audit.service.AuditService;
import cn.tedu.ivos.base.enums.ApplicationStatusEnum;
import cn.tedu.ivos.base.enums.AuditStatusEnum;
import cn.tedu.ivos.user.mapper.UserMapper;
import cn.tedu.ivos.user.pojo.vo.UserVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.StringJoiner;

@Transactional
@Slf4j
@Service
public class AuditServiceImpl implements AuditService {
    @Autowired
    AuditMapper auditMapper;
    @Autowired
    UserMapper userMapper;
    @Autowired
    ApplicationMapper applicationMapper;

    @Override
    public void insertAudit(Application application) {
        log.debug("为申请单生成对应的审批数据,参数={}", application);
        //1.获取申请单中审批人id集合
        List<Long> userIdList = application.getAuditUserIdList();
        //2.遍历上方的审批人id集合,有几个人,就要生成几条审批数据
        for (int i = 0; i < userIdList.size(); i++) {
            Audit audit = new Audit();
            //3.为当前插入的本条审批数据设置字段值
            //3.1设置申请单id
            audit.setApplicationId(application.getId());
            //3.2设置审批人id
            audit.setAuditUserId(userIdList.get(i));
            //3.2设置审批次序
            audit.setAuditSort(i);
            //3.3 设置审批单的状态
            if (i == 0) {
                audit.setAuditStatus(AuditStatusEnum.MY_PENDING.getCode());
            } else {
                audit.setAuditStatus(AuditStatusEnum.PENDING.getCode());
            }
            //3.4 设置创建时间
            audit.setCreateTime(new Date());
            //4.将本条准备好的数据入库
            auditMapper.insert(audit);
        }
    }

    @Override
    public List<AuditVO> selectAuditByApplicationId(Long id) {
        return auditMapper.selectAuditByApplicationId(id);
    }

    @Override
    public List<AuditVO> selectAudit(AuditQuery auditQuery) {
        log.debug("查询审批单:auditQuery={}", auditQuery);
        List<AuditVO> list = auditMapper.selectAudit(auditQuery);
        for (int i = 0; i < list.size(); i++) {
            AuditVO auditVO = list.get(i);
            assignAuditUserList(auditVO);
        }
        return list;
    }

    @Override
    public void updateAudit(AuditSaveParam auditSaveParam) {
        log.debug("更新审批单:auditSaveParam={}", auditSaveParam);
        Audit audit = new Audit();
        BeanUtils.copyProperties(auditSaveParam, audit);
        audit.setUpdateTime(new Date());
        //准备当前审批单对应的申请单对象
        Application application = new Application();
        application.setId(audit.getApplicationId());
        application.setUpdateTime(new Date());
        //判断前端传递的审核状态是否为通过
        if (audit.getAuditStatus().equals(AuditStatusEnum.AUDITED.getCode())){//通过
            auditMapper.update(audit);
            /*继续查其他审批单:其他审批单与当前审批单批的是同一个申请单*/
            AuditQuery auditQuery = new AuditQuery();
            auditQuery.setApplicationId(audit.getApplicationId());
            //根据申请单id查出当前申请单对应的所有未审批的审批单总数(注意:当前审批单已通过!)
            Integer count = auditMapper.selectRestAuditCount(auditQuery);
            if (count>0){//还有未审核的数据
                //下一条审批单是审核同一个申请单的，当前审批次序+1的那一条
                auditQuery.setAuditSort(audit.getAuditSort()+1);
                List<AuditVO> auditVOList = auditMapper.selectAudit(auditQuery);
                if (auditVOList != null && auditVOList.size()>0) {
                    AuditVO auditVO = auditVOList.get(0);
                    //创建第二个空的审批对象，用于审批单更新
                    Audit audit2 = new Audit();
                    audit2.setId(auditVO.getId());
                    //设置第2个审批单状态为待我审核
                    audit2.setAuditStatus(AuditStatusEnum.MY_PENDING.getCode());
                    auditMapper.update(audit2);
                }
                application.setStatus(ApplicationStatusEnum.AUDIT.getCode());
                applicationMapper.update(application);
            }else {
                //设置当前申请单的状态为已审核,更新申请单数据
                application.setStatus(ApplicationStatusEnum.AUDITED.getCode());
                applicationMapper.update(application);
            }
        }else {//驳回
            //更新当前审批单数据
            auditMapper.update(audit);
            AuditQuery auditQuery = new AuditQuery();
            auditQuery.setApplicationId(audit.getApplicationId());
            //根据申请单id查对应的所有的审批单
            List<AuditVO> auditVOList = auditMapper.selectAudit(auditQuery);
            if (auditVOList != null && auditVOList.size()>0){
                for (int i =0;i< auditVOList.size();i++){
                    AuditVO auditVO = auditVOList.get(i);
                    if (auditVO.getAuditStatus().equals(AuditStatusEnum.PENDING.getCode())){
                        auditMapper.deleteById(auditVO.getId());
                    }
                }
            }
            application.setStatus(ApplicationStatusEnum.REJECT.getCode());
            application.setRejectReason(auditSaveParam.getRejectReason());
            applicationMapper.update(application);
        }
    }

    private void assignAuditUserList(AuditVO auditVO) {
        List<String> auditUsernameList = new ArrayList<>();
        List<Long> auditUserIdList = new ArrayList<>();
        List<AuditVO> auditVOList = auditMapper.selectAuditByApplicationId(auditVO.getApplicationId());
        for (int i = 0; i < auditVOList.size(); i++) {
            Long userId = auditVOList.get(i).getAuditUserId();
            auditUserIdList.add(userId);
            UserVO user = userMapper.selectById(userId);
            auditUsernameList.add(user.getUsername());
        }
        StringJoiner stringJoiner = new StringJoiner(",");
        for (String username : auditUsernameList) {
            stringJoiner.add(username);
        }
        auditVO.setAuditUsernameList(stringJoiner.toString());
        auditVO.setAuditUserIdList(auditUserIdList);
    }
}
